BOAO Intensifier and Attenuator is the simplest,most reliable.They are designed in USA.So, they are the same as the one from USA.With ceramic plungers and Hi-load hydraulic seals,BOAO Intensifier seal life last longer and water pressure higher.The power of Intensifier would be generated incorporate the USA designed large volume attenuator.Compare to other factory's four-tension rod attenuator,BOAO attenuator is no need service.Its volume is much bigger.The pressure would be more stable,cutting speedmore fast.It is the standard part for 4000c,4000d.